Though the word "zombie" is never uttered in George Romero's landmark horror film, the director's original vision of walking undead who hunger for human flesh effectively redefined the term in 1968. The first "splatter," or "gore," film, it revolutionized the horror genre, and with its graphic portrayal of cannibalism, was instrumental in the establishment of the Motion Picture Association of America's film rating system. In 1999, the Library of Congress added it to the National Film Registry. This version features both a restored and remastered black and white print as well as a colorized version of the film. Mike Nelson of Mystery Science Theater 3000 provides optional humorous commentary.